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EP0327525A2 - Soupape à haute pression avec un siège flexible - Google Patents

Soupape à haute pression avec un siège flexible Download PDF

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Publication number
EP0327525A2
EP0327525A2 EP89870021A EP89870021A EP0327525A2 EP 0327525 A2 EP0327525 A2 EP 0327525A2 EP 89870021 A EP89870021 A EP 89870021A EP 89870021 A EP89870021 A EP 89870021A EP 0327525 A2 EP0327525 A2 EP 0327525A2
Authority
EP
European Patent Office
Prior art keywords
seal ring
seal
valve plug
seating surface
deformable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89870021A
Other languages
German (de)
English (en)
Other versions
EP0327525A3 (en
EP0327525B1 (fr
Inventor
James Russell Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fisher Controls International LLC
Original Assignee
Fisher Controls International LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fisher Controls International LLC filed Critical Fisher Controls International LLC
Publication of EP0327525A2 publication Critical patent/EP0327525A2/fr
Publication of EP0327525A3 publication Critical patent/EP0327525A3/en
Application granted granted Critical
Publication of EP0327525B1 publication Critical patent/EP0327525B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F16K1/427—Attachment of the seat to the housing by one or more additional fixing elements

Definitions

  • This invention relates to fluid valves and more particularly to fluid sealing apparatus in fluid valves for providing a reliable shutoff of high pressure fluid.
  • valves having reliable valve fluid sealing components (i.e., valve trim) which is required to provide a tight fluid shutoff for long periods of time.
  • valve trim reliable valve fluid sealing components
  • Special problems arise in such environments in view of the high pressures and the high temperatures which can range from about 250° to about 450° Fahrenheit (121° to about 232° Celsius).
  • valves for such environ­ments include complex shaped valve trim components which lead to costly manufacturing and time consuming and costly replacement during normal valve maintenance.
  • fluid valves employ metal-to-metal seating for all general applications over a wide range of pressure drops and temperatures, and metal-to-TFE (tetrafluoroethylene) seating for more stringent shutoff requirements.
  • metal-to-metal seating for all general applications over a wide range of pressure drops and temperatures
  • metal-to-TFE tetrafluoroethylene
  • An example of such a standard and optional seating is available in a design ES valve body made by Fisher Controls International, Inc.
  • This commercially available fluid valve includes a valve trim having a valve plug seating against a seal ring formed of tetrafluoroethylene (TFE) which is located in a metal seal ring housing and held in place by a metal disk retainer. While such a configuration is acceptable for most conditions, it is desired to provide a fluid valve with improved valve trim components for reliable use under stringent high pressure and high temperature conditions.
  • U.S. Patent No. 3,809,362 there is described an improved valve trim for high pressure fluid valve use and wherein a deformable plastic insert seat ring is mounted on a seat ring housing and held in place by a seat ring retainer.
  • the seat ring retainer includes a series of inwardly and outwardly formed surfaces facing opposite similarly shaped seat ring housing surfaces, and with the deformable plastic seat ring having a similar series of surfaces and located between the retainer and the housing.
  • the valve plug compresses the deformable seat ring to stress the ring above the yield point and cause it to act like a liquid to enable the seat ring to deform and displace so as to establish a plastic-to-­metal hydrostatic seal.
  • valve trim which is capable of reliable operation under high pressure, high temperature conditions. It is also desired to provide such a valve trim which is more easily manufactured and at less cost than presently available units and which can be more easily and readily maintained during normal valve maintenance.
  • a fluid valve which includes a valve plug with an outwardly extending plug seating surface, a deformable seal ring of resilient material, a seal ring housing with a flexible metal seat for holding the deformable seal ring, and a metal seal retainer surrounding the flexible metal seat and the seal.
  • the seal retainer has a closely matching contour to the seal ring so as to hold the seal ring tightly in place and so that as the valve plug closes and engages the flexible metal seat, one portion of the metal seat flexes outwardly to squeeze the deformable seal inwardly against the valve plug. Outward movement of the seal during flexing of the rigid metal seat is prevented by the closely matching contour of the metal seal retainer.
  • This valve trim has the capability to produce a tight seal on assembly with no adjustment being required.
  • the seal relaxes when the valve plug is opened and is squeezed inwardly against the valve plug to form a leak tight seal around the perimeter of the valve plug as the valve plug contacts the flexible metal seat.
  • the plastic seal is preferably made of carbon-­filled TFE, which allows repeated valve closings at temperatures up to 450° Fahrenheit (232° Celsius).
  • a significantly advantageous feature of the present invention is that the fluid valve, and particularly the valve trim components are readily manufactured, assembled, and can easily be replaced during maintenance.
  • the deformable plastic seal is merely inserted into the flexible metal seat and the seal retainer placed in position to surround both the seal and the flexible metal seat without any adjustment of the position of the components.
  • FIG. 1 illustrates a set of valve trim components 10 for a high pressure fluid valve in accordance with the principles of the present invention.
  • a valve plug 12 includes an outwardly extending plug seating surface 14.
  • a seal ring housing 16 includes a flexible metal seat 18 at the top of the housing for containing a deformable seal 20 formed of a resilient material such as an elastomer, rubber, synthetic resin polymer, etc.
  • seal 20 be formed of TFE or other synthetic resin polymer material.
  • the flexible metal seat includes a cavity 22 which is formed and defined between an outer upstanding wall 24 and an inner upstanding wall 26.
  • Wall 26 includes an extension portion projecting upwardly beyond cavity 22 and outer wall 24, and which extension portion ends in a thin, lip portion end 28.
  • Wall 26 and lip portion end 28 are formed so that upon seating contact by valve plug seating surface 14, as shown in Figure 2, the lip portion will be flexed outwardly. It is preferred that the lip portion end has a small radius to define an arcuate surface 29 which contacts valve plug seating surface 14.
  • Deformable seal 20 has a lower portion 30 adapted to fit within cavity 22, an outer trim portion 32 which extends slightly over an end 34 of outer wall 24; an inner portion 36 which extends slightly over lip portion end 28; and an upper portion 40 which projects beyond cavity 22 and above lip portion end 28.
  • a rigid metal seal retainer 42 is adapted to surround the flexible metal seat and the deformable seal.
  • retainer inner surface 44 is shaped similar to and closely matches the contour of seal ring housing surface 46
  • retainer arcuate surface 48 is shaped similar to and closely matches the similar arcuate contour of outer surface 50 of the deformable seal.
  • the closely matched contour surfaces of the retainer, seal and housing are formed with close dimensional tolerances so that there is a relatively snug fit between these components.
  • seal retainer holds the seal in place with a closely matching contour when seal retainer bottom surface 52 abuttingly contacts a ledge 54 of the seal ring housing.
  • O-ring 56 may be provided if desired as an additional seal between retainer 42 and housing 16.
  • plug 12 In operation, during closing of the valve, plug 12 is moved towards seal ring housing 16 so that plug seating surface 14 seatingly engages in metal-to-­metal sealing contact with flexible lip 28. As the valve plug closes against the metal lip, the lip flexes, thereby squeezing against the seal 20. However, in view of the closely matched contour between seal retainer 42 and the seal 20, seal 20 cannot move outwardly and instead is squeezed inwardly against valve plug seating surface 14. This provides a leak tight seal around the perimeter of the valve plug. Upon opening of the valve, plug 12 is moved away from the flexible metal seat and the seal relaxes.
  • the deformable seal 20 preferably is made of carbon-filled TFE, so as to allow repeated closings of the valve at temperatures up to 450° Fahrenheit (232° Celsius). Other grades of plastic material could be substituted for different temperature requirements and fluids. It is to be understood that while the present invention has been described for use in high pressure valves, where the valve trim is required to provide tight shutoff for long periods of time, the invention may also be used on less demanding situations involving lower pressure differentials and lower temperatures such as gasses or chemicals.
  • valve trim itself can also be used in a rotary valve.
  • valve trim of the present invention could be adapted for use in a rotary type valve with an off-centered shaft that can rotate a valve plug into the trim seal, instead of merely sliding across the valve opening as in a normal ball valve configuration.
  • the valve plug seating surface thus may be rotated into a flexible metal seat containing a deformable seal rigidly held in place by a surrounding metal seal retainer.
  • a small seat portion may be flexed outwardly to squeeze the deformable seal inwardly against the rotary valve seating surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Taps Or Cocks (AREA)
  • Gasket Seals (AREA)
EP89870021A 1988-02-05 1989-02-01 Soupape à haute pression avec un siège flexible Expired - Lifetime EP0327525B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/152,632 US4834338A (en) 1988-02-05 1988-02-05 High pressure flexible seat valve trim
US152632 1988-02-05

Publications (3)

Publication Number Publication Date
EP0327525A2 true EP0327525A2 (fr) 1989-08-09
EP0327525A3 EP0327525A3 (en) 1990-07-25
EP0327525B1 EP0327525B1 (fr) 1994-08-10

Family

ID=22543722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89870021A Expired - Lifetime EP0327525B1 (fr) 1988-02-05 1989-02-01 Soupape à haute pression avec un siège flexible

Country Status (7)

Country Link
US (1) US4834338A (fr)
EP (1) EP0327525B1 (fr)
JP (1) JP2622412B2 (fr)
AU (1) AU610335B2 (fr)
BR (1) BR8900496A (fr)
CA (1) CA1312592C (fr)
DE (1) DE68917331T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249159A (en) * 1990-08-02 1992-04-29 Utec Bv Airguns

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6776360B2 (en) * 2001-06-26 2004-08-17 Spraying Systems Co. Spray gun with improved needle shut-off valve sealing arrangement
US6840520B2 (en) 2003-01-23 2005-01-11 Fisher Controls International Llc Valve plug seal assembly
CA2462334C (fr) * 2004-03-24 2012-10-09 Yoursolarhome Inc. Panneau solaire thermique et photovoltaique integre et methode d'utilisation et de montage d'un reseau de panneaux solaires
US8413955B1 (en) * 2009-10-02 2013-04-09 Taylor Innovations, Llc Resiliently supported valve seat assembly for a safety relief valve
US11519510B1 (en) * 2021-07-08 2022-12-06 Saudi Arabian Oil Company Relief valve seal holder
CN119604710A (zh) * 2022-08-01 2025-03-11 丹佛斯有限公司 具有包括两个缸体的阀芯的阀

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE78997C (de) * J.MORAVETZ, Gratwein, Steiermark Kupferner Dichtungsring für Ventile
US3027911A (en) * 1958-08-27 1962-04-03 Fluid Mechanics Inc Plastic seal ring valve
US3131906A (en) * 1960-11-17 1964-05-05 Orbit Valve Co Valve seat
FR83984E (fr) * 1962-06-18 1964-11-06 Perfectionnements apportés aux garnitures d'étanchéité pour obturateurs de canalisation de fluide sous pression à organe de manoeuvre
US3318577A (en) * 1965-05-24 1967-05-09 George W Banks High pressure valve having soft seating and balanced seal
US3809362A (en) * 1972-03-13 1974-05-07 Masoneilan Int Inc High pressure soft seat valve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2060748A (en) * 1934-08-31 1936-11-10 Roberts Hardy Valve mechanism
CH262061A (fr) * 1947-06-05 1949-06-15 Motosacoche Sa Dispositif d'obturation.
US3327991A (en) * 1965-01-07 1967-06-27 Elvis D Wallace Valve seat with resilient support member
DE2424148C2 (de) * 1974-05-17 1983-08-11 Robert Bosch Gmbh, 7000 Stuttgart Gasdichtes Ventil für Maschinen zur Behandlung von Materialien mit hohen Temperatur- und Druckstößen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE78997C (de) * J.MORAVETZ, Gratwein, Steiermark Kupferner Dichtungsring für Ventile
US3027911A (en) * 1958-08-27 1962-04-03 Fluid Mechanics Inc Plastic seal ring valve
US3131906A (en) * 1960-11-17 1964-05-05 Orbit Valve Co Valve seat
FR83984E (fr) * 1962-06-18 1964-11-06 Perfectionnements apportés aux garnitures d'étanchéité pour obturateurs de canalisation de fluide sous pression à organe de manoeuvre
US3318577A (en) * 1965-05-24 1967-05-09 George W Banks High pressure valve having soft seating and balanced seal
US3809362A (en) * 1972-03-13 1974-05-07 Masoneilan Int Inc High pressure soft seat valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249159A (en) * 1990-08-02 1992-04-29 Utec Bv Airguns
GB2249159B (en) * 1990-08-02 1994-01-26 Utec Bv Airguns

Also Published As

Publication number Publication date
JP2622412B2 (ja) 1997-06-18
BR8900496A (pt) 1989-10-03
US4834338A (en) 1989-05-30
AU610335B2 (en) 1991-05-16
AU2957589A (en) 1989-08-10
EP0327525A3 (en) 1990-07-25
DE68917331T2 (de) 1995-03-09
JPH01224574A (ja) 1989-09-07
CA1312592C (fr) 1993-01-12
DE68917331D1 (de) 1994-09-15
EP0327525B1 (fr) 1994-08-10

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